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quocanh1909
2 năm trước
Why did the author probably divide the passage into two paragraphs?
A.To compare nineteenth-century reforms with twentieth-century reforms
B.To contrast the work of utopian thinkers with that of practical reformers
C.To give the causes for a phenomenon quenches in the second
D.To present an overview of a concept in the first paragraph and specific examples in the second
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Các câu hỏi liên quan

Read the passage and choose the best option to complete each blank.
Singapore has a highly developed market-based economy (36) _______ historically revolves around extended trade. Along with Hong Kong, South Korea and Taiwan Singapore is one (37)_______ the Four Asian Tigers. The economy depends heavily on export, refining, imported goods, especially in manufacturing. Manufacturing constituted twenty six (38) ________ of Singapore’s GDP in 2005. The manufacturing industry is well –diversified into electronic petroleum refining chemicals, (39) _______ engineering and biomedical sciences manufacturing. In 2006, Singapore produced about 10 percent of the world foundry water output. Singapore’s the busiest port in the world in terms of tonnage shipped. Singapore is The world’s fourth largest foreign exchange trading centre after London, New York City (40) _______ Tokyo.
(37)
A.of      
B.in 
C.for 
D.at

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
              Plants are subject to attack and infection by a remarkable variety of symbiotic species and have evolved a diverse array of mechanisms designed to frustrate the  potential colonists. These can be divided into preformed or passive defense mechanisms  and inducible or active systems. Passive plant defense comprises physical and chemical  barriers that prevent entry of pathogens, such as bacteria, or render tissues unpalatable or toxic to the invader. The external surfaces of plants, in addition to being covered by an epidermis and a waxy cuticle, often carry spiky hairs known as trichomes, which either prevent feeding by insects or may even puncture and kill insect larvae. Other trichomes are sticky and glandular and effectively trap and immobilize insects. If the physical barriers of the plant are breached, then preformed chemicals may inhibit or kill the intruder, and plant tissues contain a diverse array of toxic or potentially toxic substances, such as resins, tannins, glycosides, and alkaloids, many of which are highly effective deterrents to insects that feed on plants. The success of the Colorado beetle in infesting potatoes, for example, seems to be correlated with its high tolerance to alkaloids that normally repel potential pests. Other possible chemical  defenses, while not directly toxic to the parasite, may inhibit some essential step in the establishment of a parasitic relationship. For example, glycoproteins in plant cell walls may inactivate enzymes that degrade cell walls. These enzymes are often produced by bacteria and fungi.
            Active plant defense mechanisms are comparable to the immune system of  vertebrate animals, although the cellular and molecular bases are fundamentally different. Both, however, are triggered in reaction to intrusion, implying that the host has some means of recognizing the presence of a foreign organism. The most dramatic example of an inducible plant defense reaction is the hypersensitive response. In the hypersensitive response, cells undergo rapid necrosis ― that is, they become diseased and die ― after being penetrated by a parasite ; the parasite itself subsequently ceases to grow and is therefore restricted to one or a few cells around the entry site. Several theories have been put forward to explain the bases of hypersensitive resistance.
The phrase "subject to" in line 1 is closest in meaning to
A. attractive to
B.strengthened by
C.classified by
D.susceptible to

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions below.
    It is estimated that about 200 million people use the Internet computer network around the world. The Internet allows people to work at home instead of travelling to work. The Internet allows businesses to communicate with customers and workers in many parts of the world for the cost of a local telephone call.
   E-mail allows users to send documents, pictures and other data from one part of the world to another in at least 5 minutes. People can use the Internet to do shopping. This saves a lot of time. It is possible to use the Internet for education - students may connect with their teachers from home to send or receive e-mail or talk their problems through "online" rather than attending a class.
To a business, the Internet is......to communicate with customers.

A.a cheap way
B.an inconvenient way
C.a difficult way   
D.a very expensive way

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